Leviticus 25:39

“If you buy a Hebrew slave, he shall serve for six years; but on the seventh he shall go out as a free man without payment.

“If your brother, a Hebrew man or woman, is sold to you, then he shall serve you six years, but in the seventh year you shall let him go to be free from you.

“You shall not oppress a hired person who is afflicted and needy, whether he is one of your brothers or one of your sojourners who is in your land within your gates.

But Solomon did not make slaves of the sons of Israel; for they were men of war, his servants, his princes, his captains, his chariot commanders, and his horsemen.

Now a certain woman of the wives of the sons of the prophets cried out to Elisha, “Your servant my husband is dead, and you know that your servant feared Yahweh; and the creditor has come to take my two children to be his slaves.”

“So now you are intending to subdue for yourselves the people of Judah and Jerusalem for male and female slaves. Surely, do you not have your own matters of guilt against Yahweh your God?

“But now our flesh is like the flesh of our brothers, our children like their children. Yet behold, we are forcing our sons and our daughters to be slaves, and some of our daughters are forced into subjugation, and we have no power in our hands to help, and our fields and vineyards belong to others.”

The word which came to Jeremiah from Yahweh after King Zedekiah had cut a covenant with all the people who were in Jerusalem to proclaim release to them:

that each man should let his male slave go free and each man his female slave, a Hebrew man or a Hebrew woman, so that no one should enslave them, each being a Jew, his brother.

“But since he did not have the means to repay, his lord commanded him to be sold, along with his wife and children and all that he had, and repayment to be made.